public class test04 {
    public int[] twoSum(int[] nums, int target) {
        Map<Integer,Integer> hashmap = new HashMap<>();
        for(int i = 0;i<nums.length;i++){
            if(hashmap.containsKey(target-nums[i])){
                return new int[]{i,hashmap.get(target-nums[i])};
            }
            hashmap.put(nums[i],i);
        }
        return new int[0];
    }
}
